Joe Pritchard's son Jack stumbled across it while watching genuine episodes of the popular cartoon on a mobile phone as he waited for his dinner.

Joe, 25, of Cornwall said: “Jack is three and is in the process of being tested for autism, and we’ve found that if he watches a show for 15 minutes on the phone it calms him down and helps him relax.
“I always type ‘Peppa Pig’ into Youtube and then lots of episodes come up – and then I give the phone to Jack because he knows how to double-click on the one he wants to watch.

“So he clicked on this one and watched nearly the whole thing, and then we started hearing random voices and said, ‘What are you watching?’ and he said, ‘Peppa Pig – look!’.

"But when I looked at what he was actually watching, I was quite disgusted. They were talking about ‘f***’ and ‘plastic penis’.

“Now we’re not going to be able to let him watch things on the mobile anymore. It’s going to make our lives ten times harder now and it’s a shame because he enjoyed it."